Display screen or portion thereof with graphical user interface for a medical device



FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with graphical user interface for a medical device.

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with graphical user interface for a medical device; and,

FIG. 3 is a front view of a third embodiment of a display screen or portion thereof with graphical user interface for a medical device.

The broken lines showing portions of the graphical user interface and the display screen form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with graphical user interface for a medical device, as shown and described. 